import { asyncRoutes, constantRoutes } from "@/router";
import Layout from "@/layout";
import { getAuthMenu } from "@/api/user";

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role));
  } else {
    return false;
  }
}

/**
 * 后台查询的菜单数据拼装成路由格式的数据
 * @param routes (resolve: any) => require([`@/views/${view}.vue`], resolve)
 */
export function generaMenu(routes, data) {
  data.forEach(item => {
    // alert(JSON.stringify(item))
    const menu = {
      path: item.path === "#" ? item.id + "_key" : item.path,
      // component: item.component === '#' ? Layout : () => import(`@/views${item.component}`),
      component:
        item.component === "#"
          ? Layout
          : resolve => require([`@/views${item.component}`], resolve),
      redirect: item.redirect,
      hidden: !!item.hidden,
      children: [],
      name: item.name,
      meta: item.meta
      // meta: { title: item.name, id: item.id, roles: ['admin'] }
    };

    if (item.children) {
      generaMenu(menu.children, item.children);
    }
    routes.push(menu);
  });
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = [];

  routes.forEach(route => {
    const tmp = { ...route };

    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles);
      }
      res.push(tmp);
    } else {
      if (tmp.children) {
        if (
          tmp.children.findIndex(item => {
            return (
              item.meta && item.meta.roles && item.meta.roles.includes(roles[0])
            );
          }) != -1
        ) {
          tmp.children = filterAsyncRoutes(tmp.children, roles);
          res.push(tmp);
        }
      }
    }
  });

  return res;
}

const state = {
  routes: [],
  addRoutes: []
};

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes;
    state.routes = constantRoutes.concat(routes);
  }
};

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise((resolve, reject) => {
      let accessedRoutes = [];
      commit("SET_ROUTES", accessedRoutes);
      resolve(accessedRoutes);
    })
    

    // return new Promise((resolve, reject) => {
    //   const loadMenuData = [];
    //   // 先查询后台并返回左侧菜单数据并把数据添加到路由
    //   // 动态添加路由
    //   getAuthMenu(state.token)
    //     .then(response => {
    //       let data = response;
    //       if (response.code * 1 !== 200) {
    //         alert(JSON.stringify("菜单数据加载异常"));
    //         // throw new Error('菜单数据加载异常')
    //       } else {
    //         data = response.data;
    //         sessionStorage.setItem("hasMenuList", JSON.stringify(data));
    //         Object.assign(loadMenuData, data);
    //         const tempAsyncRoutes = Object.assign([], asyncRoutes);
    //         // tempAsyncRoutes = asyncRoutes
    //         generaMenu(tempAsyncRoutes, loadMenuData);
    //         tempAsyncRoutes.push({ path: "*", redirect: "/404", hidden: true });
    //         let accessedRoutes;
    //         // accessedRoutes = [];
    //         accessedRoutes = tempAsyncRoutes || [];
    //         // if (roles.includes('admin')) {
    //         //   // alert(JSON.stringify(asyncRoutes))
    //         //   accessedRoutes = tempAsyncRoutes || []
    //         // } else {
    //         //   accessedRoutes = filterAsyncRoutes(tempAsyncRoutes, roles)
    //         // }
    //         commit("SET_ROUTES", accessedRoutes);
    //         resolve(accessedRoutes);
    //       }
    //       // generaMenu(asyncRoutes, data)
    //     })
    //     .catch(error => {
    //       console.log(error);
    //       reject(error)
    //     });
    // });
  }
};

export default {
  namespaced: true,
  state,
  mutations,
  actions
};
